From: Thomas Koutcher <redacted>

When `merge.ff` is set to `only` in .gitconfig, `git subtree pull` will
fail with error `fatal: Not possible to fast-forward, aborting.`. This
fix ignores the `merge.ff` setting when using `git merge` within subtree.

Signed-off-by: Thomas Koutcher <redacted>
---
    subtree: ignore merge.ff setting
    
    When merge.ff is set to only in .gitconfig, git subtree pull will fail
    with error fatal: Not possible to fast-forward, aborting.. This fix
    ignores the merge.ff setting when using git merge within subtree.
    
    Signed-off-by: Thomas Koutcher thomas.koutcher@online.fr

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1139%2Fkoutcher%2Fsubtree-merge-ff-fix-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1139/koutcher/subtree-merge-ff-fix-v1
Pull-Request: https://github.com/git/git/pull/1139

 contrib/subtree/git-subtree.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 7f767b5c38f..de918d9fb05 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh

@@ -976,10 +976,10 @@ cmd_merge () {
 
 	if test -n "$arg_addmerge_message"
 	then
-		git merge -Xsubtree="$arg_prefix" \
+		git -c merge.ff= merge -Xsubtree="$arg_prefix" \
 			--message="$arg_addmerge_message" "$rev"
 	else
-		git merge -Xsubtree="$arg_prefix" $rev
+		git -c merge.ff= merge -Xsubtree="$arg_prefix" $rev
 	fi
 }